AirHint found the following cheapest return flights from London (LCY) to Jakarta (CGK) in September 2025 (see full year).

Return flights

22 Sep - 30 Sep	KLM
23 Sep - 30 Sep	KLM
25 Sep - 30 Sep	SWISS
18 Sep - 30 Sep	KLM
04 Sep - 09 Sep	SWISS
16 Sep - 29 Sep	KLM
17 Sep - 29 Sep	KLM
18 Sep - 09 Oct	KLM
09 Sep - 30 Sep	KLM
14 Sep - 22 Sep	KLM
16 Sep - 25 Sep	KLM
10 Sep - 01 Oct	British Airways
28 Sep - 28 Oct	KLM
19 Sep - 20 Oct	KLM
18 Sep - 04 Oct	KLM
24 Sep - 12 Oct	KLM
10 Sep - 15 Oct	British Airways
26 Sep - 09 Oct	KLM
27 Sep - 27 Oct	KLM
30 Sep - 29 Oct	KLM

Also check the deals for one-way flights from London to Jakarta in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from London to Jakarta in September from $868

Return flights